This is an open-world simulation shooting game, and also the sequel to Neo Aquarium: The King of Crustaceans. It was originally released at Comiket 88 followed by an English version released on April 8, 2016. In the future, man has disappeared and the Earth has been flooded. Human souls have been reincarnated as fish with the ability to shoot air bullets, homing scales, and plasma cannons, and are in an everlasting war over reefs. Take your squadron of 6 fish/crustaceans/battleships and become the Ace of Seafood. There are a total of 39 reefs in the game that could be explored with species of fish defending it. Since different fish will come in various way, players need to use their resources wisely, upgrade and organizing appropriate team members to complete them.